Transmission cable

Abstract

The present application relates to the technical field of signal transmission and provides a transmission cable. The transmission cable comprises at least one cable assembly and a connector assembly. Each cable assembly comprises a signal line and a metal shielding layer, and the metal shielding layer wraps around the exterior of the signal line. The connector assembly is located on at least one end of the at least one cable assembly. The connector assembly comprises a metal housing, a circuit board, and a shielding member. The circuit board is located on one side of the metal housing, and the at least one cable assembly is fixed on the side of the metal housing opposite to the circuit board. The signal line and the metal shielding layer separately extend into the metal housing, and the signal signal is electrically connected to the circuit board. The shielding member is located inside the metal housing, and is separately connected to an outer wall of the metal shielding layer and an inner wall of the metal housing. In the transmission cable provided in the present application, a metal braided layer is eliminated so that the flexibility is improved and the bending radius is reduced, thereby enabling the transmission cable to meet usage requirements in complex wiring scenarios such as large-scale, high-density scenarios.

Description

Transmission cable

[0001] The application claims priority to the Chinese patent application No. 202422230202.7, filed on September 11, 2024, and entitled "Transmission cable", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of signal transmission cable, in particular to a transmission cable. BACKGROUND

[0003] The transmission cable is a cable specially used for signal transmission, and the anti-interference performance is one of the key performance indicators of the transmission cable.

[0004] In the related art, the transmission cable uses a core wire for signal transmission, and the core wire is wrapped with an aluminum foil and a metal braid layer (or metal outer layer) in sequence to shield electromagnetic interference from the outside.

[0005] However, the metal braid layer has high hardness and limited bending radius, which results in insufficient flexibility of the transmission cable and cannot meet the use requirements in complex wiring scenarios such as large scale and high density. SUMMARY

[0006] The embodiments of the present application provide a transmission cable, which can solve the technical problems existing in the related art.

[0007] Specifically, the technical solution is as follows.

[0008] A transmission cable, comprising: at least one cable assembly and a connector assembly;

[0009] Each cable assembly comprises a signal line and a metal shielding layer, and the metal shielding layer is wrapped outside the signal line;

[0010] The connector assembly is located at least one end of the at least one cable assembly;

[0011] The connector assembly comprises a metal shell, a circuit board and a shielding member;

[0012] The circuit board is located on one side of the metal shell, and the at least one cable assembly is fixed on the side of the metal shell opposite to the circuit board;

[0013] The signal line and the metal shielding layer extend to the inside of the metal shell respectively, and the signal line is electrically connected with the circuit board; the shielding member is located in the inside of the metal shell and is connected with the outer wall of the metal shielding layer and the inner wall of the metal shell respectively.

[0014] The transmission cable provided by the embodiment of the present application cancels the metal braid layer, can effectively reduce the hardness of the transmission cable, has better flexibility, has a smaller bending radius, and can also reduce the weight of the transmission cable, so that the transmission cable can meet the use requirements in a large-scale high-density complex wiring scene.

[0015] The transmission cable can shield external interference by the shielding member in the joint assembly, so that the transmission cable has better flexibility while ensuring the EMI (Electromagnetic Interference) effect of the transmission cable.

[0016] In some possible implementation manners, the shielding member is at least one of a conductive structure and a wave-absorbing structure.

[0017] The conductive structure or the wave-absorbing structure is used as the shielding member, which can reflect or absorb the radiation interference or the coupling interference, and realize the overall shielding effect of the transmission cable. Mylar is a film layer made of polyester film, which is made of polyethylene terephthalate (PET) and has many excellent physical and chemical properties.

[0018] In some possible implementation manners, the shielding member is a metal foil, and the shielding member is wound on the metal shielding layer.

[0019] The metal foil is used as the shielding member and connected with the metal shielding layer in a winding manner, which is simple in structure, convenient to produce and process, has good lamination effect of the shielding member and the metal shielding layer, has better conductive connection reliability, and can be compressed and deformed according to the space shape of the metal shell in the winding process, so as to better fit the metal shell and improve the working reliability of the shielding member.

[0020] In some possible implementation manners, the number of the cable assemblies is at least two, the at least two cable assemblies are arranged in parallel, and the metal shielding layer in each cable assembly is connected with the shielding member.

[0021] Through the above arrangement, when the number of the cable assemblies is at least two, the metal shielding layer of each cable assembly is connected with the shielding member, so that the shielding member can provide good electromagnetic shielding effect for each cable assembly, and the electromagnetic shielding effect of the whole transmission cable is realized.

[0022] In some possible implementation manners, the shielding member includes a single-wire shielding foil and a wire harness shielding foil.

[0023] The single-wire shielding foil is wound on the metal shielding layer of each cable assembly, the wire harness shielding foil is wound on the wire harness formed by at least two cable assemblies, and the wire harness shielding foil and the single-wire shielding foil are in position coincidence.

[0024] Through the above arrangement, first, the metal shielding layer of each cable assembly is independently wound by the single-wire shielding foil, then the wire harness formed by at least two cable assemblies is integrally wound by the wire harness shielding foil, and the wire harness shielding foil is wound on the single-wire shielding foil, so that the electrical connection of the metal shielding layer of each cable assembly, the plurality of single-wire shielding foils and the wire harness shielding foil is realized, and the reliability of the electrical connection of the shielding member and the metal shielding layer of each cable assembly is higher.

[0025] In some possible implementation manners, the outer wall of the metal shielding layer is provided with a protective film layer;

[0026] The protective film layer inside the metal shell has a recessed avoidance gap to the metal shielding layer, and the shielding member is electrically connected with the metal shielding layer in the avoidance gap.

[0027] The embodiment opens an avoidance gap on the protective film layer in the metal shell, exposes a part of the metal shielding layer, and correspondingly arranges the shielding member with the avoidance gap, so that the shielding member can be electrically connected with the metal shielding layer exposed by the avoidance gap, thereby forming a shielding structure of the metal shielding layer, the shielding member and the metal shell.

[0028] In some possible implementation manners, the metal shielding layer is an aluminum foil structure, and / or the protective film layer is a Mylar film structure.

[0029] The aluminum foil has good processing performance and excellent electrical conductivity, and the metal shielding layer made of the aluminum foil structure has low production cost and better shielding effect.

[0030] In some possible implementation manners, the signal line includes at least one core wire and at least one ground wire.

[0031] Each cable assembly further includes an insulating filler, and the insulating filler is filled between the at least one core wire and the at least one ground wire.

[0032] The insulating filler is used to fill the gap inside the cable assembly, which can improve the structural stability of the cable assembly, reduce the warping of the cable assembly, improve the waterproof performance, and enhance the mechanical and chemical protection. Moreover, the insulating filler is usually non-conductive, which can ensure the insulation performance between the core wire and the ground wire.

[0033] In some possible implementation manners, the transmission cable further includes a sheath, and the sheath is wrapped outside the at least one cable assembly.

[0034] The cable assembly can be mechanically and chemically protected by the outer sheath of the line assembly component, and the performance, service life and safety of the cable assembly can be improved.

[0035] In some possible implementation manners, the transmission cable is a direct connection cable.

[0036] The transmission cable as the direct connection cable is suitable as a connection tool for signal transmission between devices. BRIEF DESCRIPTION OF DRAWINGS

[0037] Fig. 1 is a structural cross-sectional view of a transmission cable according to an embodiment of the present application;

[0038] Fig. 2 is a structural exploded view of a transmission cable according to an embodiment of the present application;

[0039] Fig. 3 is a structural schematic view of a transmission cable according to an embodiment of the present application;

[0040] Fig. 4 is a schematic view of a connection between a cable assembly and a shielding member according to an embodiment of the present application;

[0041] Fig. 5 is a schematic view of a connection between a cable assembly and a shielding member according to another embodiment of the present application;

[0042] Fig. 6 is a schematic view of a connection between a cable assembly and a shielding member according to another embodiment of the present application;

[0043] Fig. 7 is a schematic view of a connection between a cable assembly and a shielding member according to another embodiment of the present application.

[0044] The reference signs are as follows: 1, cable assembly; 11, signal line; 111, core wire; 112, ground wire; 12, insulating filler; 13, metal shielding layer; 131, protective film layer; 1311, avoiding notch; 2, connector assembly; 21, metal shell; 211, first shell; 212, second shell; 22, line board; 23, shielding member; 231, single-wire shielding foil; 232, wire harness shielding foil; 3, sheath. DETAILED DESCRIPTION

[0045] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "length", "width", "thickness" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and the orientation may change when the product is placed in different postures, therefore it cannot be understood as a limitation on the embodiments of the present application.

[0046] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments belong.

[0047] For the purpose of making the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0048] In combination with FIG. 1, FIG. 2 and FIG. 3, the present embodiment provides a transmission cable, which comprises at least one cable assembly 1 and a connector assembly 2. Exemplarily, the number of the cable assembly 1 is one, two, three or the like.

[0049] Each cable assembly 1 comprises a signal line 11 and a metal shielding layer 13, and the metal shielding layer 13 is wrapped outside the signal line 11.

[0050] Exemplarily, the signal line 11 and the metal shielding layer 13 are arranged in an insulating and spaced manner.

[0051] The signal line 11 is used for transmitting electrical signals, and the metal shielding layer 13 can shield external interference for the signal line 11. Moreover, when the signal line 11 is multiple, the metal shielding layer 13 can form electromagnetic shielding between different signal lines 11, so that each signal line 11 can transmit signals without interference.

[0052] Exemplarily, the signal line 11 can be a metal wire or an optical fiber wire.

[0053] The connector assembly 2 is located at least one end of the at least one cable assembly 1. Exemplarily, the number of the connector assembly 2 is one, which is located at one end of the cable assembly 1. Alternatively, the number of the connector assembly 2 is two, which are respectively located at two ends of the cable assembly 1.

[0054] The connector assembly 2 comprises a metal shell 21, a circuit board 22 and a shielding member 23; the circuit board 22 is located at one side of the metal shell 21, and the at least one cable assembly 1 is fixed at the side of the metal shell 21 opposite to the circuit board 22; the signal line 11 and the metal shielding layer 13 respectively extend to the inside of the metal shell 21, and the signal line 11 is electrically connected with the circuit board 22; the shielding member 23 is located in the inside of the metal shell 21 and is connected with the outer wall of the metal shielding layer 13 and the inner wall of the metal shell 21 respectively.

[0055] Exemplarily, the signal line 11 and the circuit board 22 are connected in a welding manner.

[0056] The transmission cable provided by the embodiment cancels the metal braid layer, can effectively reduce the hardness of the transmission cable, has better flexibility, has a smaller bending radius, and can reduce the weight of the transmission cable, so that the transmission cable can meet the use requirements in a large-scale high-density complex wiring scene.

[0057] The transmission cable can shield external interference by the shielding member 23 in the connector assembly 2, so that the transmission cable has better flexibility while ensuring the EMI (Electromagnetic Interference) effect.

[0058] In some possible implementation manners, when the number of the cable assemblies 1 is multiple, the multiple cable assemblies 1 can be fixed on the same side of the metal shell 21, and the signal lines 11 of each cable assembly 1 respectively extend into the metal shell 21 in parallel and are respectively electrically connected to the circuit board 22.

[0059] Through the above arrangement, the same connector assembly 2 can realize the connection of multiple cable assemblies 1, the transmission cable can use multiple cable assemblies 1 for signal transmission, and has better signal transmission performance. The side where the circuit board 22 is located is the plug-in end of the connector assembly 2, and the end of the circuit board 22 facing the outside of the metal shell 21 can be provided with a gold finger.

[0060] In some possible implementation manners, the connection mode of the shielding member 23 and the outer wall of the metal shielding layer 13 can be that the shielding member 23 wraps the metal shielding layer 13, or the shielding member 23 is connected to one side of the metal shielding layer 13, or the shielding member 23 is connected to both sides of the metal shielding layer 13.

[0061] In some possible implementation manners, as shown in FIG. 2, the metal shell 21 includes a first shell 211 and a second shell 212, the first shell 211 and the second shell 212 are combined to form a containing cavity, at least part of the circuit board 22 extends into the containing cavity from one side, at least part of the cable assembly 1 extends into the containing cavity from the opposite side, and the signal line 11 is electrically connected to the circuit board 22 located in the containing cavity; the shielding member 23 is located in the containing cavity and is connected to the metal shielding layer 13 of the cable assembly 1 located in the containing cavity.

[0062] In some possible implementation manners, the transmission cable can be a transmission cable with a flat cross section, or a transmission cable with a circular cross section.

[0063] In some possible implementations, the connector assembly 2 can be an optical module interface, including but not limited to an SFP (Small Form Pluggable) interface and a QSFP (Quad Small Form-factor Pluggable) interface, and the like.

[0064] Exemplarily, when the cable assembly 1 is respectively provided with the connector assemblies 2 at two ends, the two connector assemblies 2 can be of the same type or different types.

[0065] When the two connector assemblies 2 are both SFP interfaces, the transmission cable is an SFP-SPF cable; when the two connector assemblies 2 are both QSFP interfaces, the transmission cable is a QSFP-QSPF cable; when one of the two connector assemblies 2 is an SFP interface and the other is a QSFP interface, the transmission cable is a QSFP-4SPF cable.

[0066] In some possible implementations, the shielding member 23 is at least one of a conductive structure and an electromagnetic wave absorbing structure. The conductive structure can be a structure made of a conductive material, and the electromagnetic wave absorbing structure can be a structure made of an electromagnetic wave absorbing material.

[0067] The conductive structure or the electromagnetic wave absorbing structure can be used as the shielding member 23 to reflect or absorb the radiation interference or the coupling interference, thereby achieving the overall shielding effect of the transmission cable.

[0068] Exemplarily, the shielding member 23 is made of electromagnetic wave absorbing material, which is a material specially used for absorbing electromagnetic waves (including microwaves, radio frequencies, and the like). The electromagnetic wave absorbing material includes but is not limited to the following types:

[0069] Conductive polymer: such as polyaniline, which has good conductivity and wave absorbing performance, and is light in structure.

[0070] Carbon-based material: such as carbon nanotubes, graphene and composite materials thereof, which have excellent conductivity and wave absorbing performance.

[0071] Ferrite material: such as ferrite particles or composite materials, which have excellent magnetic properties and are particularly suitable for use in the radio frequency field.

[0072] Metal foam or metal fiber material: These materials can effectively scatter electromagnetic waves, and can also absorb a certain proportion of electromagnetic waves.

[0073] Multi-layer structure: A multi-layer composite material is designed by combining materials with different dielectric constants and magnetic permeabilities, so as to achieve good absorbing performance in a wider frequency range.

[0074] In some possible implementations, the shielding member 23 includes, but is not limited to, conductive foam, conductive rubber, conductive plastic, metal spring, wave-absorbing rubber, wave-absorbing plastic, and the like.

[0075] In combination with FIG. 4, in some possible implementations, the shielding member 23 is a metal foil, and the shielding member 23 is wound on the metal shielding layer 13.

[0076] The metal foil is used as the shielding member 23, and the shielding member 23 is connected to the metal shielding layer 13 in a winding manner, which is simple in structure and convenient in production and processing, has good lamination effect of the shielding member 23 and the metal shielding layer 13, and has better electrical connection reliability. In addition, the metal foil can be compressed and deformed during the winding process according to the spatial shape of the metal shell 21, can be better laminated to the metal shell 21, and thus the working reliability of the shielding member 23 is improved.

[0077] Compared with the conductive plastic, the metal foil is used as the shielding member 23, and there is no need to worry about the poor lap joint effect of the conductive plastic after curing and the poor reliability of the conductive plastic without curing. Compared with the wave-absorbing coating, since the wave-absorbing coating is usually made of metal powder or metal wire, chippings are prone to occur during the bending process, and the chippings may be sucked into the case by the fan to cause short circuit. However, the metal foil is used as the shielding member 23, and there is no chipping problem.

[0078] In combination with FIGS. 5 and 6, in some possible implementations, the number of the cable assemblies 1 is at least two, and the at least two cable assemblies 1 are arranged in parallel, and the metal shielding layer 13 in each cable assembly 1 is connected to the shielding member 23.

[0079] Through the above arrangement, when the number of the cable assemblies 1 is at least two, the metal shielding layer 13 in each cable assembly 1 is connected to the shielding member 23, so that the shielding member 23 can provide good electromagnetic shielding effect for each cable assembly 1, thereby realizing the electromagnetic shielding effect of the whole transmission cable.

[0080] For example, when the number of the cable assemblies 1 is at least two, all the cable assemblies 1 are arranged on the same side of the metal shell 21, and each cable assembly 1 has a section extending into the metal shell 21. The protective film layer 131 on the outer wall of the metal shielding layer 13 of each cable assembly 1 is provided with a relief gap 1311, and the positions of the relief gaps 1311 on each cable assembly 1 are aligned, so that only one shielding member 23 can be arranged at the corresponding position, and the shielding member 23 can be electrically connected to the metal shielding layer 13 of each cable assembly 1 at the same time.

[0081] Optionally, the plurality of cable assemblies 1 are arranged in parallel along the same plane, so that the shielding member 23 arranged on one side or both sides of the plane can be electrically connected to the metal shielding layer 13 of each cable assembly 1 at the same time.

[0082] In combination with Fig. 5, in some possible implementation manners, the shielding member 23 comprises a single-wire shielding foil 231 and a wire harness shielding foil 232.

[0083] The single-wire shielding foil 231 is wound on the metal shielding layer 13 in each cable assembly 1, the wire harness shielding foil 232 is wound on the wire harness formed by at least two cable assemblies 1, and the wire harness shielding foil 232 and the single-wire shielding foil 231 are in position coincidence.

[0084] Through the above arrangement, firstly, the metal shielding layer 13 of each cable assembly 1 is independently wound by the single-wire shielding foil 231, then the wire harness formed by at least two cable assemblies 1 is integrally wound by the wire harness shielding foil 232, and the wire harness shielding foil 232 is wound on the single-wire shielding foil 231, so that the electrical connection of the metal shielding layer 13 of each cable assembly 1, the plurality of single-wire shielding foils 231 and the wire harness shielding foil 232 is realized, and the electrical connection reliability of the shielding member 23 and the metal shielding layer 13 of each cable assembly 1 is higher.

[0085] In combination with Figs. 4 to 7, in some possible implementation manners, the outer wall of the metal shielding layer 13 is provided with a protective film layer 131.

[0086] The protective film layer 131 located inside the metal shell 21 has a relief gap 1311 recessed to the metal shielding layer 13, and the shielding member 23 is electrically connected with the metal shielding layer 13 in the relief gap 1311.

[0087] Considering that the metal shielding layer 13 usually has high hardness and brittle material, and is prone to breakage and damage in the bending process of the transmission cable, the protective film layer 131 is arranged on the outer wall of the metal shielding layer 13, which can not only fix and connect the metal shielding layer 13 by the protective film layer 131, but also externally insulate and protect the metal shielding layer 13.

[0088] On this basis, the relief gap 1311 is arranged on the protective film layer 131 located in the metal shell 21 to expose a part of the metal shielding layer 13, and the shielding member 23 is arranged correspondingly to the relief gap 1311, so that the shielding member 23 can be electrically connected with the metal shielding layer 13 exposed by the relief gap 1311, thereby forming a shielding structure of the metal shielding layer 13, the shielding member 23 and the metal shell 21.

[0089] The shielding structure not only can absorb or reflect the internal interference of the joint assembly 2 towards the cable assembly 1, but also can absorb or reflect the coupling interference of the transmission cable towards the joint assembly 2, thereby realizing the electromagnetic shielding effect of the entire transmission cable.

[0090] In some possible implementation manners, the avoidance gap 1311 is formed by a method such as laser irradiation.

[0091] In some possible implementation manners, the outer wall of the metal shielding layer 13 is provided with a protective film layer 131, and the protective film layer 131 inside the metal shell 21 is connected with the shielding member 23, so as to form a sandwich structure of the metal shielding layer 13, the protective film layer 131 and the shielding member 23, which can also play a role in absorbing or reflecting radiation interference and coupling interference.

[0092] In some possible implementation manners, the metal shielding layer 13 is an aluminum foil structure. The aluminum foil has good processing performance and excellent electrical conductivity, and the metal shielding layer 13 is made of the aluminum foil structure, which has low production cost and better shielding effect.

[0093] In some possible implementation manners, the protective film layer 131 is a Mylar film structure.

[0094] Mylar is a film layer made of polyester film, which is made of polyethylene terephthalate (PET) and has many excellent physical and chemical properties.

[0095] Mylar has high tensile strength and tear resistance, can be used in a temperature range of -70°C to 150°C, and is an excellent electrical insulating material, which has good resistance to many chemicals and is not easy to be corroded.

[0096] In some possible implementation manners, the signal line 11 includes at least one core wire 111 and at least one ground wire 112, as shown in FIGS. 1 and 4.

[0097] Each cable assembly 1 further includes an insulating filler 12 filled between the at least one core wire 111 and the at least one ground wire 112.

[0098] The insulating filler 12 fills the gap inside the cable assembly 1, which can improve the structural stability of the cable assembly 1, reduce the warping of the cable assembly, improve the waterproof performance, and enhance the mechanical and chemical protection, etc. Moreover, the insulating filler 12 is usually non-conductive, which can ensure the insulation performance between the core wire 111 and the ground wire 112.

[0099] In some possible implementation manners, the transmission cable further includes a sheath 3 wrapped outside the at least one cable assembly 1, as shown in FIGS. 1 and 2.

[0100] The sheath 3 wrapped outside the cable assembly 1 can provide mechanical and chemical protection for the cable assembly 1, improve the performance, service life and safety of the cable assembly 1. Exemplarily, the sheath 3 can be divided into various types, including PVC (polyvinyl chloride), polyolefin, low-smoke halogen-free material, etc.

[0101] In some possible implementation manners, the transmission cable is a direct connection cable, which is suitable for being used as a connection tool for signal transmission between devices, for example, for connecting switches, servers and storage devices in a rack for stacking.

[0102] The direct connection cable, also known as DAC, can be divided into active and passive types. The passive DAC cable has lower power consumption and can transmit data at a rate of 4 to 10 GB per second, which is suitable for short-distance connection. The DAC cable made of copper performs well in heat dissipation, which helps to improve the safety and environmental protection of the data center. Compared with the optical cable, the DAC cable has lower cost and almost no power consumption, thereby reducing the electricity bill.

[0103] In some possible implementation manners, the connector assembly 2 is an optical connection module such as SFP+, SFP28, QSFP+, QSFP56 or QSFP28, which can be connected to devices such as switches.

[0104] In some possible implementation manners, in combination with FIGS. 1 and 5, the embodiment provides a transmission cable, which includes a plurality of cable assemblies 1 and a connector assembly 2. Each cable assembly 1 includes at least one core wire 111 and at least one ground wire 112, a metal shielding layer 13 and an insulating filler 12. The metal shielding layer 13 is wrapped outside the at least one core wire 111 and the at least one ground wire 112, and the insulating filler 12 is filled between the at least one core wire 111 and the at least one ground wire 112.

[0105] The outer wall of the metal shielding layer 13 is provided with a protective film layer 131.

[0106] The connector assembly 2 includes a metal shell 21, a circuit board 22 and a shielding member 23. The circuit board 22 is located on one side of the metal shell 21, and a plurality of cable assemblies 1 can be fixed on the opposite side of the metal shell 21. The signal wire 11 and the metal shielding layer 13 of each cable assembly 1 extend into the metal shell 21 in parallel, respectively, and are electrically connected to the circuit board 22, respectively.

[0107] The shielding member 23 is located inside the metal shell 21 and is connected to the outer wall of the metal shielding layer 13 and the inner wall of the metal shell 21, respectively.

[0108] The shielding member 23 includes a single-wire shielding foil 231 and a wire harness shielding foil 232.

[0109] The single-wire shielding foil 231 is wound on the metal shielding layer 13 or the shielding film layer 131 in each cable assembly 1, the wire harness shielding foil 232 is wound on the wire harness formed by the plurality of cable assemblies 1, and the wire harness shielding foil 232 and the single-wire shielding foil 231 are coincident in position.

[0110] In the related art, the metal braided outer thickness is about 0.15 mm, and the laminated thickness is more than 0.4 mm. The transmission cable provided in the embodiments of the present application cancels the conventional metal braided layer (metal outer cover), and the overall weight of the transmission cable is reduced by 20% compared with the related art, and the bending radius is also greatly reduced. Moreover, by arranging the shielding member 23 in the joint assembly 2, internal radiation interference and cable coupling interference can be effectively absorbed or reflected, and the transmission cable has good electromagnetic shielding performance.

[0111] The transmission cable provided in the embodiments of the present application can be widely applied to the scene of high-speed, high-density, multi-cluster, and super-node physical connection.

[0112] The above is only for facilitating the understanding of the technical solution of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission cable, characterized by The transmission cable comprises at least one cable assembly (1) and a connector assembly (2); Each cable assembly (1) comprises a signal line (11) and a metal shielding layer (13) wrapped outside the signal line (11); The connector assembly (2) is located at least one end of the at least one cable assembly (1); The connector assembly (2) comprises a metal shell (21), a circuit board (22) and a shielding member (23); The circuit board (22) is located on one side of the metal shell (21), and the at least one cable assembly (1) is fixed on the side of the metal shell (21) opposite to the circuit board (22); The signal line (11) and the metal shielding layer (13) extend into the metal shell (21) respectively, and the signal line (11) is electrically connected with the circuit board (22); and the shielding member (23) is located in the metal shell (21) and connected with the outer wall of the metal shielding layer (13) and the inner wall of the metal shell (21) respectively.

2. The transmission cable of claim 1, wherein, The shielding member (23) is at least one of a conductive structure and a wave-absorbing structure.

3. The transmission cable of claim 1, wherein, The shielding member (23) is a metal foil, and the shielding member (23) is wound on the metal shielding layer (13).

4. The transmission cable of claim 3, wherein, The number of the cable assembly (1) is at least two, and the at least two cable assemblies (1) are arranged in parallel, and the metal shielding layer (13) in each cable assembly (1) is connected with the shielding member (23) respectively.

5. The transmission cable of claim 4, wherein, The shielding member (23) comprises a single-wire shielding foil (231) and a wire harness shielding foil (232); The single-wire shielding foil (231) is wound on the metal shielding layer (13) in each cable assembly (1), and the wire harness shielding foil (232) is wound on the wire harness formed by the at least two cable assemblies (1), and the positions of the wire harness shielding foil (232) and the single-wire shielding foil (231) coincide.

6. The transmission cable of claim 1, wherein, The outer wall of the metal shielding layer (13) is provided with a protective film layer (131); The protective film layer (131) located in the metal shell (21) has a recessed gap (1311) recessed to the metal shielding layer (13), and the shielding member (23) is electrically connected with the metal shielding layer (13) in the gap (1311).

7. The transmission cable of claim 6, wherein, The metal shielding layer (13) is an aluminum foil structure, and / or the protective film layer (131) is a Mylar film structure.

8. The transmission cable of any of claims 1 to 7, wherein, The signal line (11) comprises at least one core wire (111) and at least one ground wire (112); Each cable assembly (1) further comprises an insulating filler (14) filled between the at least one core wire (111) and the at least one ground wire (112).

9. The transmission cable of any of claims 1 to 7, wherein, The transmission cable further comprises a sheath (3) wrapped outside the at least one cable assembly (1).

10. The transmission cable of claim 1, wherein, The transmission cable is a direct connection cable.

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